WHERE DO OUR NUMBERS COME FROM? Around 500 BC, the Greek philosopher ¹ Pythagoras is understood to have come up with the idea of odd and even numbers. 2 It is said that Pythagoras prepared the way for many famous Greek mathematicians including Archimedes. ³ Archimedes is considered to be one of the greatest mathematicians of all time. He discovered how to measure the volume of an object with an irregular shape. 4 He is believed to have been taking a bath when he made the discovery, and leapt out shouting 'Eureka!' ('I have found it!'). Unfortunately, Archimedes was killed by a Roman soldier in 212 BC and mathematics entered a dark age. 5 It is thought that the Romans just weren't interested in mathematics. Brahmi numerals around 300 AD 1 2 3 4 5 6 7 8 9 - = = + h 4 ? S? There are known to have been several other civilizations, including the Maya | Focus 4. Second Edition. Student's Book | 2/106

it + passive verb (present or past) + that clause

subject + passive verb (present or past) + to + infinitive (to do/to have done/to be

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